使用scribe库将图像发布到Twitter时，不会创建访问令牌

Question

   OAuthService oAuth = new ServiceBuilder()
                .provider(TwitterApi.class)
                .apiKey("6JyIkj71ZqG4wk3YF0Y4hw")        // REPLACE WITH YOUR OWN!!!
                .apiSecret("sJl9aRVqlEt7nxlKvpMVK6tLULz5FSQ2KUOW0yie4")  // REPLACE WITH YOUR OWN!!!
                .callback(TwitterApp.CALLBACK_URL)             // REPLACE WITH YOUR OWN!!!
                .build();

            Log.e("hi","hi");
            Token requestToken = oAuth.getRequestToken();
            if(requestToken!=null){
                Log.e("has requestToken","has");
            }
            Uri uri = Uri.parse(TwitterApp.CALLBACK_URL);
            String verifier = uri.getQueryParameter("oauth_verifier");
            Verifier v = new Verifier(verifier);
//          Token accesstoken= TwitterApp.mAccessToken;


            if(v!=null){
                Log.e("verifier created","created");
            }
            Token accesstoken=oAuth.getAccessToken(requestToken, v);
            Log.e("raw resp", accesstoken.getRawResponse());
//          Log.e("access",accesstoken.toString());
        // BUILD OAUTH REQUEST & SIGN IT RIGHT AWAY (OTHERWISE MULTIPART FORM MAY PREVENT SIGNING)
           if(accesstoken!=null){

               Log.e("hello","hhello");
             Log.e("access token","hi"+accesstoken.toString());
            OAuthRequest request = new OAuthRequest(Verb.POST, "https://upload.twitter.com/1/statuses/update_with_media.json");
            oAuth.signRequest(accesstoken, request);  // ENTER USER'S ACCESS TOKEN

        // ADD MULTIPART FORM

            try
            {
                MultipartEntity entity = new MultipartEntity();

                entity.addPart("status", new StringBody("insert vacuous statement here"));       // THIS IS THE TWITTER MESSAGE
                entity.addPart("media", new FileBody(new File("/storage/sdcard0/HelloAlbum/1361964305003.jpg")));  // THIS IS THE PHOTO TO UPLOAD

                ByteArrayOutputStream out = new ByteArrayOutputStream();
                entity.writeTo(out);

                request.addPayload(out.toByteArray());
                request.addHeader(entity.getContentType().getName(), entity.getContentType().getValue());
            }
            catch (UnsupportedEncodingException e) {e.printStackTrace();}
            catch (IOException e) {e.printStackTrace();}

        // SEND REQUEST

            try {JSONObject response = new JSONObject (request.send().getBody());}
            catch (JSONException e) {Log.e("TOUR_APP_TAG", "JSONException Thrown: " + e.getMessage());}

           }

logcat的：

03-01 13:14:52.582: E/AndroidRuntime(5810): FATAL EXCEPTION: main
03-01 13:14:52.582: E/AndroidRuntime(5810): java.lang.IllegalArgumentException: Must provide a valid string as verifier
03-01 13:14:52.582: E/AndroidRuntime(5810):     at org.scribe.utils.Preconditions.check(Preconditions.java:80)
03-01 13:14:52.582: E/AndroidRuntime(5810):     at org.scribe.utils.Preconditions.checkNotNull(Preconditions.java:27)
03-01 13:14:52.582: E/AndroidRuntime(5810):     at org.scribe.model.Verifier.<init>(Verifier.java:22)
03-01 13:14:52.582: E/AndroidRuntime(5810):     at com.android.twitter.TwitterActivity$1.onComplete(TwitterActivity.java:278)
03-01 13:14:52.582: E/AndroidRuntime(5810):     at com.twitter.android.TwitterApp$1.handleMessage(TwitterApp.java:244)
03-01 13:14:52.582: E/AndroidRuntime(5810):     at android.os.Handler.dispatchMessage(Handler.java:99)
03-01 13:14:52.582: E/AndroidRuntime(5810):     at android.os.Looper.loop(Looper.java:137)
03-01 13:14:52.582: E/AndroidRuntime(5810):     at android.app.ActivityThread.main(ActivityThread.java:5039)
03-01 13:14:52.582: E/AndroidRuntime(5810):     at java.lang.reflect.Method.invokeNative(Native Method)
03-01 13:14:52.582: E/AndroidRuntime(5810):     at java.lang.reflect.Method.invoke(Method.java:511)
03-01 13:14:52.582: E/AndroidRuntime(5810):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
03-01 13:14:52.582: E/AndroidRuntime(5810):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
03-01 13:14:52.582: E/AndroidRuntime(5810):     at dalvik.system.NativeStart.main(Native Method)


 I am using the above code to post image to the twitter.I used scribe library to complete this task.

我得到了（Requesttoken和Verifier），但我没有得到“accessstoken”。

过去两天我一直在研究这个问题，但没有找到任何解决方案。

请建议解决此问题

由于